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因此,我仍在学习Java,并尝试实现跳转搜索以在对象数组中基于no_resi查找数据。
我了解它做int数组时,但我仍然困惑如何使用对象数组。我已经尝试过使用它来做一些事情,但仍然无法摆脱它,或者我只是愚蠢。
在此先感谢您提供的任何帮助!
这是我的代码
JumpSearch.java
public class JumpSearch {
public static int jumpsearch(Pengiriman[] arrayPengiriman, int no_resi) {
int n = arrayPengiriman.length;
// Mencari ukuran blok untuk dilompati
int step = (int)Math.floor(Math.sqrt(n));
// Mencari blok tempat elemen berada
// present (kalau elemet present)
int prev = 0;
while (arrayPengiriman[1-Math.min(step, n)] < no_resi)
{
prev = step;
step += (int)Math.floor(Math.sqrt(n));
if (prev >= n)
return -1;
}
// Melakukan linear search untuk x di dalam blok
// dimulai dengan prev
while (arrayPengiriman[1-Math.min(step, n)] < no_resi)
{
prev++;
// Jika mencapai blok berikutnya atau akhir
// array, elemen tidak ada.
if (prev == Math.min(step, n))
return -1;
}
// Jika elemen ditemukan
if (arrayPengiriman[prev] == no_resi)
return prev;
return -1;
}
// Program untuk menguji fungsi
public static void main(String [ ] args)
{
Scanner scan = new Scanner(System.in);
System.out.println("|==============================================================================|");
System.out.println("| PROGRAM PENCARIAN DATA PENGIRIMAN BARANG DENGAN ALGORITMA JUMP SEARCH |");
System.out.println("|==============================================================================|");
System.out.println("|Kasus Mencari Data Pengiriman Dengan No.Resi Menggunakan Algoritma Jump Search|");
System.out.println("");
// Array untuk menampung nilai tiap Data
Pengiriman[] arrayPengiriman = new Pengiriman[16];
Pengiriman kirim1 = new Pengiriman (101101,"Adam Kamil","Jl.Anggrek","Bogor","Gunungbatu","16118");
Pengiriman kirim2 = new Pengiriman (101102,"Putra Mandala","Jl.Apel","Kerawang","Kerawang Barat","41311");
Pengiriman kirim3 = new Pengiriman (101103,"Mamat Sanusi","Jl.Merpati","Jakarta Selatan","Lenteng Agung","12610");
Pengiriman kirim4 = new Pengiriman (101104,"Kamila Akhwan","Jl.Kelapa","Bekasi","Bekasi Timur","17111");
Pengiriman kirim5 = new Pengiriman (101105,"Putra Iskandar","Jl.Anggrek 2","Bogor","Menteng","16111");
Pengiriman kirim6 = new Pengiriman (101106,"Nabila Putri","Jl.Merapi","Palu","Tatanga","94239");
Pengiriman kirim7 = new Pengiriman (101107,"Imam Satya","Jl.Pulau Nias","Manado","Bunaken","95231");
Pengiriman kirim8 = new Pengiriman (101108,"Robby Dermawan","Jl.Tajung Pura","Yogyakarta","Gondokusuman","55225");
Pengiriman kirim9 = new Pengiriman (101109,"Adrian Suta","Jl.Dewi Sartika","Banggai","Luwuk","94712");
Pengiriman kirim10= new Pengiriman (1011010,"Rizky Prima","Jl.Gunung Jati","Jayawijaya","Wamena","99511");
Pengiriman kirim11 = new Pengiriman (1011011,"Margareth Warouw","Jl.Sawit","Jakarta Timur","Cibubur","13720");
Pengiriman kirim12 = new Pengiriman (1011012,"Jeni Indira","Jl.Tuna","Bekasi","Bekasi Barat","17136");
Pengiriman kirim13 = new Pengiriman (1011013,"Asep Suratman","Jl.Palapa","Bogor","Margajaya","16116");
Pengiriman kirim14 = new Pengiriman (1011014,"Gigi Purnama","Jl.Keraton Atas","Bekasi","Setu","17320");
Pengiriman kirim15 = new Pengiriman (1011015,"Kamila Dewi","Jl.Dago Timur","Bandung","Coblong","40135");
Pengiriman kirim16 = new Pengiriman (1011016,"Desy Sambeta","Jl.Proklamasi","Surabaya","Wonocolo","60239");
//memasukan data mahasiswa ke dalam array
arrayPengiriman[0]=kirim1;
arrayPengiriman[1]=kirim2;
arrayPengiriman[2]=kirim3;
arrayPengiriman[3]=kirim4;
arrayPengiriman[4]=kirim5;
arrayPengiriman[5]=kirim6;
arrayPengiriman[6]=kirim7;
arrayPengiriman[7]=kirim8;
arrayPengiriman[8]=kirim9;
arrayPengiriman[9]=kirim10;
arrayPengiriman[10]=kirim11;
arrayPengiriman[11]=kirim12;
arrayPengiriman[12]=kirim13;
arrayPengiriman[13]=kirim14;
arrayPengiriman[14]=kirim15;
arrayPengiriman[15]=kirim16;
Pengiriman tampilPengiriman = new Pengiriman();
System.out.println("|==============================================================================|");
System.out.println("| DATA PENGIRIMAN |");
System.out.println("|==============================================================================|");
System.out.println("");
for(int i = 0; i < 16; i++){
//Menampilkan Array yang sudah disorting secara Ascending
tampilPengiriman = arrayPengiriman[i];
System.out.print(" "+(i+1)+". ");
System.out.print(tampilPengiriman.getNoResi()+" ");
System.out.print(tampilPengiriman.getNamaPengirim()+" ");
System.out.print(tampilPengiriman.getAlamatTujuan()+" ");
System.out.print(tampilPengiriman.getKotaTujuan()+" ");
System.out.print(tampilPengiriman.getKecamatanTujuan()+" ");
System.out.println(tampilPengiriman.getKodePosTujuan()+" ");
}
System.out.println("");
System.out.println("--------------------------------------------------------------------------------");
System.out.println("|==============================================================================|");
System.out.println("| CARI DATA PENGIRIMAN |");
System.out.println("|==============================================================================|");
System.out.println("");
//Memasukan 'noRes'
System.out.print("\n Masukkan No Resi yang ingin dicari datanya : ");
int no_resi = scan.nextInt();
// Mencari index dari 'x' dengan jump search
int index = jumpsearch(arrayPengiriman, no_resi);
System.out.println("");
System.out.println("--------------------------------------------------------------------------------");
System.out.println("|==============================================================================|");
System.out.println("| HASIL PENCARIAN DATA PENGIRIMAN |");
System.out.println("|==============================================================================|");
System.out.println("");
// Menampilkan index dimana 'x' ditemukan
if (no_resi != -1 && index != -1) {
System.out.println("\n Data pengiriman barang dengan" + no_resi +
" ditemukan di index ke " + index);
} else {
System.out.println("\n Data pengiriman dengan No Resi" + no_resi +
" tidak ditemukan");
}
System.out.println("|==============================================================================|");
}
}
public class Pengiriman{
private int no_resi;
private String nama_pengirim;
private String alamat_tujuan;
private String kota_tujuan;
private String kecamatan_tujuan;
private String kode_pos_tujuan;
public Pengiriman(){
this.no_resi = 0;
this.nama_pengirim = "";
this.alamat_tujuan = "";
this.kota_tujuan = "";
this.kecamatan_tujuan = "";
this.kode_pos_tujuan = "";
}
public Pengiriman(int no_resi,String nama_pengirim, String alamat_tujuan,
String kota_tujuan, String kecamatan_tujuan, String kode_pos_tujuan){
this.no_resi = no_resi;
this.nama_pengirim = nama_pengirim;
this.alamat_tujuan = alamat_tujuan;
this.kota_tujuan = kota_tujuan;
this.kecamatan_tujuan = kecamatan_tujuan;
this.kode_pos_tujuan = kode_pos_tujuan;
}
public int getNoResi() {
return no_resi;
}
public void setNoResi(int no_resi) {
this.no_resi = no_resi;
}
public String getNamaPengirim() {
return nama_pengirim;
}
public void setNamaPengirim (String nama_pengirim) {
this.nama_pengirim = nama_pengirim;
}
public String getAlamatTujuan() {
return alamat_tujuan;
}
public void setAlamatTujuan (String alamat_tujuan) {
this.alamat_tujuan = alamat_tujuan;
}
public String getKotaTujuan() {
return kota_tujuan;
}
public void setKotaTujuan (String kota_tujuan) {
this.kota_tujuan = kota_tujuan;
}
public String getKecamatanTujuan() {
return kecamatan_tujuan;
}
public void setKecamatanTujuan (String kecamatan_tujuan) {
this.kecamatan_tujuan = kecamatan_tujuan;
}
public String getKodePosTujuan(){
return kode_pos_tujuan;
}
public void setKodePosTujuan (String kode_pos_tujuan) {
this.kode_pos_tujuan = kode_pos_tujuan;
}
}
最佳答案
在大多数情况下,您的代码可以正常工作,但是这里需要注意一些小事情,还有其他需要考虑的事情。让我们从Pengiriman类开始。
在Pengiriman类中,您有一个典型的构造函数,该构造函数不接受任何参数,并且在该构造函数中,您将所有类成员变量的默认值设置为0或Null String(“”)。如果仅在声明的位置初始化变量,则可以消除此附加代码。每当创建新的Pengiriman实例时,这将使这些值成为默认值,例如:
public class Pengiriman{
private int no_resi = 0;
private String nama_pengirim = "";
private String alamat_tujuan = "";
private String kota_tujuan = "";
private String kecamatan_tujuan = "";
private String kode_pos_tujuan = "";
public Pengiriman(){ }
// .... Overloaded Contructor(s) ....
// .... Getters and Setters ....
// .... Nice to have a toString() method ....
}
Pengiriman p = new Pengiriman();
p.setNoResi(101109);
Pengiriman[] arrayPengiriman = new Pengiriman[16];
arrayPengiriman[0] = new Pengiriman(101101, "Adam Kamil", "Jl.Anggrek", "Bogor", "Gunungbatu", "16118");
arrayPengiriman[1] = new Pengiriman(101102, "Putra Mandala", "Jl.Apel", "Kerawang", "Kerawang Barat", "41311");
arrayPengiriman[2] = new Pengiriman(101103, "Mamat Sanusi", "Jl.Merpati", "Jakarta Selatan", "Lenteng Agung", "12610");
// ..... etc. .....
arrayPengiriman[0] = kirim1;
arrayPengiriman[1] = kirim2;
arrayPengiriman[2] = kirim3;
arrayPengiriman[3] = kirim4;
arrayPengiriman[4] = kirim5;
arrayPengiriman[5] = kirim6;
arrayPengiriman[6] = kirim7;
arrayPengiriman[7] = kirim8;
arrayPengiriman[8] = kirim9;
arrayPengiriman[9] = kirim10;
arrayPengiriman[10] = kirim11;
arrayPengiriman[11] = kirim12;
arrayPengiriman[12] = kirim13;
arrayPengiriman[13] = kirim14;
arrayPengiriman[14] = kirim15;
arrayPengiriman[15] = kirim16;
//Your class must start with:
public class Pengiriman implements Comparable<Pengiriman> {
// Sort by Receipt Number in 'Ascending Order'.
@Override
public int compareTo(Pengiriman comparePengiriman) {
int compareNoResi = comparePengiriman.getNoResi();
//ascending order
return this.no_resi - compareNoResi;
// If you want Descending order then use this instead:
// return compareNoResi - this.no_resi;
}
// Sort the Object Array
Arrays.sort(arrayPengiriman);
// Somewhere in the Pengiriman class:
@Override
public String toString() {
return no_resi + ", " + nama_pengirim + ", " + alamat_tujuan +
", " + kota_tujuan + ", " + kecamatan_tujuan + ", " +
kode_pos_tujuan;
}
System.out.println(arrayPengiriman[8].toString());
101109, Adrian Suta, Jl.Dewi Sartika, Banggai, Luwuk, 94712
// Sort the Object Array
Arrays.sort(arrayPengiriman);
System.out.println("|==============================================================================|");
System.out.println("| DATA PENGIRIMAN |");
System.out.println("|==============================================================================|");
System.out.println("");
// Displays the Sorted Array
for (int i = 0; i < 16; i++) {
System.out.print(" " + (i + 1) + ". " + arrayPengiriman[i].toString());
}
while (arrayPengiriman[1 - Math.min(step, n)] < no_resi) {
1 - Math.min(step, n)
。从1的值中减去
Math.min(step, n)
的值,换句话说就是
1 - (calculated index value)
。您认为最终会得到什么样的指数值?确实... ArrayIndexOutOfBoundsException!它应该是:从
Math.min(step, n)
减去1或换句话说
(calculated index value) - 1
:
while (arrayPengiriman[Math.min(step, n) - 1] < no_resi) {
while (arrayPengiriman[Math.min(step, n) - 1].getNoResi() < no_resi) {
String senderName = arrayPengiriman[12].getNamaPengirim();
while (arrayPengiriman[prev].getNoResi() < no_resi) {
if (arrayPengiriman[prev].getNoResi() == no_resi) {
return prev;
}
public class JumpSearch {
public static int jumpsearch(Pengiriman[] arrayPengiriman, int no_resi) {
int n = arrayPengiriman.length;
// Find the block size to skip
int step = (int) Math.floor(Math.sqrt(n));
// Finds the block where the element is located
// present (if element present)
int prev = 0;
while (arrayPengiriman[Math.min(step, n) - 1].getNoResi() < no_resi) {
prev = step;
step += (int) Math.floor(Math.sqrt(n));
if (prev >= n) {
return -1;
}
}
// Perform a linear search for x in blocks
// starts with prev
while (arrayPengiriman[prev].getNoResi() < no_resi) {
prev++;
// If you reach the next or last block
// array, missing element.
if (prev == Math.min(step, n)) {
return -1;
}
}
// If an element is found
if (arrayPengiriman[prev].getNoResi() == no_resi) {
return prev;
}
return -1;
}
// Program for functional testing
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
System.out.println("|==============================================================================|");
System.out.println("| PROGRAM PENCARIAN DATA PENGIRIMAN BARANG DENGAN ALGORITMA JUMP SEARCH |");
System.out.println("|==============================================================================|");
System.out.println("| Case Finding Shipping Data With Recession Using Jump Search Algorithm |");
System.out.println("");
// Array untuk menampung nilai tiap Data
Pengiriman[] arrayPengiriman = new Pengiriman[16];
arrayPengiriman[0] = new Pengiriman(101101, "Adam Kamil", "Jl.Anggrek", "Bogor", "Gunungbatu", "16118");
arrayPengiriman[1] = new Pengiriman(101102, "Putra Mandala", "Jl.Apel", "Kerawang", "Kerawang Barat", "41311");
arrayPengiriman[2] = new Pengiriman(101103, "Mamat Sanusi", "Jl.Merpati", "Jakarta Selatan", "Lenteng Agung", "12610");
arrayPengiriman[3] = new Pengiriman(101104, "Kamila Akhwan", "Jl.Kelapa", "Bekasi", "Bekasi Timur", "17111");
arrayPengiriman[4] = new Pengiriman(101105, "Putra Iskandar", "Jl.Anggrek 2", "Bogor", "Menteng", "16111");
arrayPengiriman[5] = new Pengiriman(101106, "Nabila Putri", "Jl.Merapi", "Palu", "Tatanga", "94239");
arrayPengiriman[6] = new Pengiriman(101107, "Imam Satya", "Jl.Pulau Nias", "Manado", "Bunaken", "95231");
arrayPengiriman[7] = new Pengiriman(101108, "Robby Dermawan", "Jl.Tajung Pura", "Yogyakarta", "Gondokusuman", "55225");
arrayPengiriman[8] = new Pengiriman(101109, "Adrian Suta", "Jl.Dewi Sartika", "Banggai", "Luwuk", "94712");
arrayPengiriman[9] = new Pengiriman(1011010, "Rizky Prima", "Jl.Gunung Jati", "Jayawijaya", "Wamena", "99511");
arrayPengiriman[10] = new Pengiriman(1011011, "Margareth Warouw", "Jl.Sawit", "Jakarta Timur", "Cibubur", "13720");
arrayPengiriman[11] = new Pengiriman(1011012, "Jeni Indira", "Jl.Tuna", "Bekasi", "Bekasi Barat", "17136");
arrayPengiriman[12] = new Pengiriman(1011013, "Asep Suratman", "Jl.Palapa", "Bogor", "Margajaya", "16116");
arrayPengiriman[13] = new Pengiriman(1011014, "Gigi Purnama", "Jl.Keraton Atas", "Bekasi", "Setu", "17320");
arrayPengiriman[14] = new Pengiriman(1011015, "Kamila Dewi", "Jl.Dago Timur", "Bandung", "Coblong", "40135");
arrayPengiriman[15] = new Pengiriman(1011016, "Desy Sambeta", "Jl.Proklamasi", "Surabaya", "Wonocolo", "60239");
// Sort the Object Array
Arrays.sort(arrayPengiriman);
System.out.println("|==============================================================================|");
System.out.println("| DATA PENGIRIMAN |");
System.out.println("|==============================================================================|");
System.out.println("");
// Displays the Ascending Sorted Array
for (int i = 0; i < 16; i++) {
System.out.println(" " + (i + 1) + ". " + arrayPengiriman[i].toString());
}
// Apply the Search Mechanism...
System.out.println("");
System.out.println("--------------------------------------------------------------------------------");
System.out.println("|==============================================================================|");
System.out.println("| SEARCH SHIPPING DATA |");
System.out.println("|==============================================================================|");
System.out.println("");
// Enter 'noRes'
System.out.print(" Enter the receipt number you want to search for: ");
int no_resi = scan.nextInt();
// Finding index of 'x' with jump search
int index = jumpsearch(arrayPengiriman, no_resi);
System.out.println("");
System.out.println("--------------------------------------------------------------------------------");
System.out.println("|==============================================================================|");
System.out.println("| RESULTS OF SHIPPING DATA RESULTS |");
System.out.println("|==============================================================================|");
System.out.println("");
// Displays the index where 'x' is found
if (no_resi != -1 && index != -1) {
System.out.println("Shipping data with " + no_resi
+ " found in index to " + index);
}
else {
System.out.println("Shipping data with Receipt No " + no_resi
+ " not found");
}
System.out.println("|==============================================================================|");
}
}
public class Pengiriman implements Comparable<Pengiriman> {
private int no_resi = 0;
private String nama_pengirim = "";
private String alamat_tujuan = "";
private String kota_tujuan = "";
private String kecamatan_tujuan = "";
private String kode_pos_tujuan = "";
public Pengiriman() { }
public Pengiriman(int no_resi, String nama_pengirim, String alamat_tujuan,
String kota_tujuan, String kecamatan_tujuan, String kode_pos_tujuan) {
this.no_resi = no_resi;
this.nama_pengirim = nama_pengirim;
this.alamat_tujuan = alamat_tujuan;
this.kota_tujuan = kota_tujuan;
this.kecamatan_tujuan = kecamatan_tujuan;
this.kode_pos_tujuan = kode_pos_tujuan;
}
public int getNoResi() {
return no_resi;
}
public void setNoResi(int no_resi) {
this.no_resi = no_resi;
}
public String getNamaPengirim() {
return nama_pengirim;
}
public void setNamaPengirim(String nama_pengirim) {
this.nama_pengirim = nama_pengirim;
}
public String getAlamatTujuan() {
return alamat_tujuan;
}
public void setAlamatTujuan(String alamat_tujuan) {
this.alamat_tujuan = alamat_tujuan;
}
public String getKotaTujuan() {
return kota_tujuan;
}
public void setKotaTujuan(String kota_tujuan) {
this.kota_tujuan = kota_tujuan;
}
public String getKecamatanTujuan() {
return kecamatan_tujuan;
}
public void setKecamatanTujuan(String kecamatan_tujuan) {
this.kecamatan_tujuan = kecamatan_tujuan;
}
public String getKodePosTujuan() {
return kode_pos_tujuan;
}
public void setKodePosTujuan(String kode_pos_tujuan) {
this.kode_pos_tujuan = kode_pos_tujuan;
}
@Override
public int compareTo(Pengiriman comparePengiriman) {
int compareNoResi = comparePengiriman.getNoResi();
//ascending order
return this.no_resi - compareNoResi;
// If you want Descending order then use this instead:
// return compareNoResi - this.no_resi;
}
@Override
public String toString() {
return no_resi + ", " + nama_pengirim + ", " + alamat_tujuan
+ ", " + kota_tujuan + ", " + kecamatan_tujuan + ", "
+ kode_pos_tujuan;
}
}
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我已经在 Java 中实现了带有动态类型的简单解释语言。不幸的是我遇到了以下问题。测试时如下代码: def main() { def ks = Map[[1, 2]].keySet()
一直提示输入 1 到 10 的数字 - 结果应将 st、rd、th 和 nd 添加到数字中。编写一个程序,提示用户输入 1 到 10 之间的任意整数,然后以序数形式显示该整数并附加后缀。 public
我有这个 DownloadFile.java 并按预期下载该文件: import java.io.*; import java.net.URL; public class DownloadFile {
我想在 GUI 上添加延迟。我放置了 2 个 for 循环,然后重新绘制了一个标签,但这 2 个 for 循环一个接一个地执行,并且标签被重新绘制到最后一个。 我能做什么? for(int i=0;
我正在对对象 Student 的列表项进行一些测试,但是我更喜欢在 java 类对象中创建硬编码列表,然后从那里提取数据,而不是连接到数据库并在结果集中选择记录。然而,自从我这样做以来已经很长时间了,
我知道对象创建分为三个部分: 声明 实例化 初始化 classA{} classB extends classA{} classA obj = new classB(1,1); 实例化 它必须使用
我有兴趣使用 GPRS 构建车辆跟踪系统。但是,我有一些问题要问以前做过此操作的人: GPRS 是最好的技术吗?人们意识到任何问题吗? 我计划使用 Java/Java EE - 有更好的技术吗? 如果
我可以通过递归方法反转数组,例如:数组={1,2,3,4,5} 数组结果={5,4,3,2,1}但我的结果是相同的数组,我不知道为什么,请帮助我。 public class Recursion { p
有这样的标准方式吗? 包括 Java源代码-测试代码- Ant 或 Maven联合单元持续集成(可能是巡航控制)ClearCase 版本控制工具部署到应用服务器 最后我希望有一个自动构建和集成环境。
我什至不知道这是否可能,我非常怀疑它是否可能,但如果可以,您能告诉我怎么做吗?我只是想知道如何从打印机打印一些文本。 有什么想法吗? 最佳答案 这里有更简单的事情。 import javax.swin
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